1399066 has 8 divisors (see below), whose sum is σ = 2222100. Its totient is φ = 658368.

The previous prime is 1399063. The next prime is 1399109. The reversal of 1399066 is 6609931.

It can be written as a sum of positive squares in 2 ways, for example, as 1390041 + 9025 = 1179^2 + 95^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 41149 = 1399066 / (1 + 3 + 9 + 9 + 0 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (1399063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20541 + ... + 20608.

2^1399066 is an apocalyptic number.

1399066 is a deficient number, since it is larger than the sum of its proper divisors (823034).

1399066 is a wasteful number, since it uses less digits than its factorization.

1399066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41168.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1399066 is about 1182.8212037328. The cubic root of 1399066 is about 111.8440111626.

The spelling of 1399066 in words is "one million, three hundred ninety-nine thousand, sixty-six".